302  
FNCA52 TJSJ 310825  
FWFSJU  
 
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO  
NATIONAL WEATHER SERVICE SAN JUAN PR  
425 AM AST SUN MAY 31 2020  
   
DISCUSSION
 
 
KDBI REMAINS ABOVE THE CRITICAL THRESHOLD FOR MANY AREAS ALONG  
THE SOUTH COASTAL PLAINS, WITH 10HR FUEL MOISTURE IS EXPECTED TO  
CONTINUE AROUND 9% AS NO WETTING RAINS ARE EXPECTED FOR THESE AREAS  
TODAY. RH VALUES ARE EXPECTED TO DROP TO THE MID TO UPPER 40S IN  
AS OVERALL DRY CONDITIONS WILL PREVAIL ALTHOUGH A FEW BRIEF SHOWERS  
MAY AFFECT SOME AREAS INLAND. ADDITIONALLY, TRANSPORT WINDS WILL  
AGAIN INCREASE DURING THE LATE MORNING AND AFTERNOON HOURS TO AROUND  
15 MPH OR MORE. THEREFORE, THERE WILL BE AN ELEVATED RISK OF FIRE  
DANGER FOR THE SOUTH COASTAL PLAINS TODAY.  
 
PRZ014-010830-  
SOUTHEAST COASTAL PLAINS-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 10 30 30  
TEMP (24H TREND) 90 (+1) 75 (0) 89  
RH % (24H TREND) 47 (-4) 87 (0) 52  
20FTWND-VAL/AM(MPH) E 12 E 9  
20FTWND-RDG/PM(MPH) SE 15 E 8 SE 10  
MIXING HGT(FT-AGL/MSL)7001 6945  
TRANSPORT WND (MPH) E 16 E 10  
VENT RATE (KT-FT) 95342 70517  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 4 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ015-010830-  
SOUTHERN HILLS-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 10 20 30  
TEMP (24H TREND) 89 (+2) 72 (-1) 88  
RH % (24H TREND) 48 (-4) 88 (0) 48  
20FTWND-VAL/AM(MPH) E 10 E 8  
20FTWND-RDG/PM(MPH) SE 12 E 7 SE 9  
MIXING HGT(FT-AGL/MSL)7443 7376  
TRANSPORT WND (MPH) E 14 SE 9  
VENT RATE (KT-FT) 90644 73514  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 2  
HAINES INDEX 4 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ016-010830-  
NORTH COASTAL PLAINS-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 10 20 40  
TEMP (24H TREND) 90 (-1) 75 (-1) 90  
RH % (24H TREND) 50 (-3) 85 (-1) 48  
20FTWND-VAL/AM(MPH) E 9 E 8  
20FTWND-RDG/PM(MPH) E 13 E 9 G17 E 9  
MIXING HGT(FT-AGL/MSL)6952 7477  
TRANSPORT WND (MPH) E 15 SE 9  
VENT RATE (KT-FT) 94552 68211  
DISPERSION 5 5  
DSI 6 6 6  
LAL 2 1 2  
HAINES INDEX 4 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ017-010830-  
NORTHERN HILLS-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR PCLDY  
PRECIP TYPE SHOWERS NONE TSTMS  
CHANCE PRECIP (%) 30 0 70  
TEMP (24H TREND) 90 (0) 72 (-1) 89  
RH % (24H TREND) 47 (-6) 87 (-2) 49  
20FTWND-VAL/AM(MPH) E 8 E 6  
20FTWND-RDG/PM(MPH) NE 10 E 6 NE 6  
MIXING HGT(FT-AGL/MSL)8656 7742  
TRANSPORT WND (MPH) E 12 SE 6  
VENT RATE (KT-FT) 93664 62848  
DISPERSION 5 5  
DSI 6 5 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ018-010830-  
WEST COAST-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE SHOWERS NONE TSTMS  
CHANCE PRECIP (%) 20 0 30  
TEMP (24H TREND) 89 (0) 75 (-1) 89  
RH % (24H TREND) 53 (-3) 80 (-7) 51  
20FTWND-VAL/AM(MPH) E 8 E 6  
20FTWND-RDG/PM(MPH) SE 7 LGT/VAR SE 6  
MIXING HGT(FT-AGL/MSL)7649 7523  
TRANSPORT WND (MPH) E 8 SE 8  
VENT RATE (KT-FT) 90530 82988  
DISPERSION 5 5  
DSI 6 4 6  
LAL 2 1 2  
HAINES INDEX 3 3 2  
 
REMARKS...NONE.  
 

 
 
PRZ019-010830-  
EASTERN INTERIOR-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 20 40 40  
TEMP (24H TREND) 90 (+1) 72 (-2) 89  
RH % (24H TREND) 45 (-6) 91 (+2) 45  
20FTWND-VAL/AM(MPH) E 10 SE 8  
20FTWND-RDG/PM(MPH) E 11 E 8 SE 9  
MIXING HGT(FT-AGL/MSL)8471 7752  
TRANSPORT WND (MPH) E 16 SE 10  
VENT RATE (KT-FT) 95879 65816  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 2  
HAINES INDEX 3 2 3  
 
REMARKS...NONE.  
 

 
 
PRZ022-010830-  
LUQUILLO MOUNTAIN RANGE-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 20 50 40  
TEMP (24H TREND) 86 (0) 71 (-2) 86  
RH % (24H TREND) 55 (-1) 91 (+2) 52  
20FTWND-VAL/AM(MPH) E 10 SE 9  
20FTWND-RDG/PM(MPH) E 11 E 8 SE 9  
MIXING HGT(FT-AGL/MSL)6052 5950  
TRANSPORT WND (MPH) E 17 SE 12  
VENT RATE (KT-FT) 86418 61461  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 2  
HAINES INDEX 4 2 4  
 
REMARKS...NONE.  
 

 
 
PRZ023-010830-  
CENTRAL MOUNTAIN RANGE-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE SHOWERS NONE TSTMS  
CHANCE PRECIP (%) 30 0 60  
TEMP (24H TREND) 89 (+2) 69 (-2) 89  
RH % (24H TREND) 42 (-7) 90 (+2) 46  
20FTWND-VAL/AM(MPH) E 8 SE 6  
20FTWND-RDG/PM(MPH) E 7 LGT/VAR SE 5  
MIXING HGT(FT-AGL/MSL)9489 8367  
TRANSPORT WND (MPH) E 9 SE 6  
VENT RATE (KT-FT) 84999 52930  
DISPERSION 5 5  
DSI 6 4 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ024-010830-  
CAYEY MOUNTAIN RANGE-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 10 40 40  
TEMP (24H TREND) 87 (0) 72 (-2) 87  
RH % (24H TREND) 52 (0) 89 (0) 49  
20FTWND-VAL/AM(MPH) E 11 E 9  
20FTWND-RDG/PM(MPH) E 12 E 8 SE 9  
MIXING HGT(FT-AGL/MSL)6609 6511  
TRANSPORT WND (MPH) E 17 SE 10  
VENT RATE (KT-FT) 92501 57163  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 2  
HAINES INDEX 4 2 3  
 
REMARKS...NONE.  
 

 
 
PRZ025-010830-  
VIEQUES-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 10 50 30  
TEMP (24H TREND) 86 (-1) 79 (-1) 86  
RH % (24H TREND) 61 (-2) 81 (+1) 59  
20FTWND-VAL/AM(MPH) E 12 E 11  
20FTWND-RDG/PM(MPH) E 14 E 11 SE 9  
MIXING HGT(FT-AGL/MSL)5650 5741  
TRANSPORT WND (MPH) E 17 SE 13  
VENT RATE (KT-FT) 86151 66755  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 4 2 4  
 
REMARKS...NONE.  
 

 
 
PRZ026-010830-  
CULEBRA-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 10 50 30  
TEMP (24H TREND) 89 (+2) 79 (-1) 87  
RH % (24H TREND) 61 (-2) 82 (0) 59  
20FTWND-VAL/AM(MPH) E 12 SE 12  
20FTWND-RDG/PM(MPH) E 14 E 13 SE 10  
MIXING HGT(FT-AGL/MSL)5697 5729  
TRANSPORT WND (MPH) E 17 SE 15  
VENT RATE (KT-FT) 87047 72280  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 4 2 4  
 
REMARKS...NONE.  
 

 
 
PRZ027-010830-  
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 10 0 20  
TEMP (24H TREND) 90 (+1) 76 (0) 89  
RH % (24H TREND) 48 (-5) 82 (-5) 49  
20FTWND-VAL/AM(MPH) E 12 E 10  
20FTWND-RDG/PM(MPH) SE 14 E 9 SE 10  
MIXING HGT(FT-AGL/MSL)7475 7558  
TRANSPORT WND (MPH) E 16 E 14  
VENT RATE (KT-FT) 106145 93568  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 4 3 3  
 
REMARKS...NONE.  
 

 
 
VIZ001-010830-  
SAINT THOMAS AND SAINT JOHN-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR PCLDY MCLEAR  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 10 40 10  
TEMP (24H TREND) 89 (+2) 76 (-2) 88  
RH % (24H TREND) 59 (-2) 83 (0) 58  
20FTWND-VAL/AM(MPH) E 12 SE 11  
20FTWND-RDG/PM(MPH) E 12 E 12 SE 10  
MIXING HGT(FT-AGL/MSL)5995 5809  
TRANSPORT WND (MPH) E 17 SE 14  
VENT RATE (KT-FT) 94271 70626  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 4 3 4  
 
REMARKS...NONE.  
 

 
 
VIZ002-010830-  
ST CROIX-  
425 AM AST SUN MAY 31 2020  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR PCLDY MCLEAR  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 20 40 10  
TEMP (24H TREND) 90 (+2) 77 (0) 88  
RH % (24H TREND) 57 (-4) 83 (-1) 52  
20FTWND-VAL/AM(MPH) E 12 E 12  
20FTWND-RDG/PM(MPH) E 12 E 11 SE 10  
MIXING HGT(FT-AGL/MSL)6356 6117  
TRANSPORT WND (MPH) E 17 SE 16  
VENT RATE (KT-FT) 93710 82853  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 2 4  
 
REMARKS...NONE.  
 

 
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab PR Page Main Text Page